skiboot-5.1.14 was released on Wed March 9th, 2016.
skiboot-5.1.14 is the 15th stable release of 5.1, it follows skiboot-5.1.13 (which was released January 27th, 2016). This release contains a spelling fix in a log message and an added device tree property to enable older kernels (with bootloader support) to use a framebuffer that is redirected to the BMC VGA port.
As such, skiboot-5.1.14 has no advantage over skiboot-5.1.13 unless you are wanting the neat offb framebuffer trick.
fsp: fix spelling of “advertise” in log message See: https://www.youtube.com/watch?v=8Gv0H-vPoDc
Explicit 1:1 mapping in ranges properties have been added to PCI bridges. This allows a neat trick with offb and VGA ports that should probably not be told to young children.